(1) The plastic handle of the upper cover is fixed with six screws, and two ends of the cover are fixed with handles. Two screws in the three-stage adjusting mechanism are connected with the sample column welded on the metal cover.

(2) For these two screws, first uncover the sticker covered on the three-section pressure regulating handle (the cover paper is marked with easy boiling, difficult boiling and standard), unscrew the handle fixing screw and take off the adjusting handle.

(3) pry open the cover plate on the handle (it is easy to pry it open because of the pinch), and then you can remove the last two screws.

(4) After the handle is removed, remove the aluminum ring in the leather bowl, install the epithelial bowl, and insert the aluminum ring, and you're done.

Precautions: If the apron of the pan is broken, there will be air leakage, pinch feet and dry pan. It should be replaced with a new one. According to the frequency of use and the aging degree of aprons, the average family changes them once every five years.